Plaster-scoring tool



y E. J. BENSON 1,760,107

PLASTER SCORING TOOL Filed May 31, 1928 VEN TOR.

ElnwfJflmsm I 1 4 r ATTORNE g Patented May 27, 1930 UNITED STATES PATENT OFFICE ERNEST J'. BENSON, OF LOS ANGELES, CALIFORNIA, ASSIGNOR OF FIFTY-ONE O1\TE HUNDREDTHS TO EDWARD \VESTBERG', F GLENDALE, CALIFORNIA PLASTER-SCORING TOQL Application filed May 31,

This invention relates to and has for an object the provision of a new and improved type of plaster scoring tool, by means of which plasterers, after the application of a coat of plaster to a wall and while the same is still moist, may scrape or score the same so as to provide a bond for a succeeding coat of plaster.

Another object is to provide a scoring tool 1 embodying a handle with a plurality of scrapers slidably mounted thereon and arranged to be extended from the handle and spread apart fan-like into position for use, and to be retracted and supported on the handle in collapsed position when not in use.

Other objects may appear as the description progresses.

In the accompanying drawings I have shown a preferred form of invention, subject to modification within the scope of the appended claim without departing from the spirit thereof. In said drawings,

Fig. 1 is a plan view of my improved scoring tool extended intoposition for use.

Fig. 2 is a plan view of the same contracted into position of disuse.

Fig. 3 is a longitudinal section of the tool on line 33 of Fig. 2. i

Fig. a is a transverse section on line 4.4.-

of Fig. 2.

Fig. 5 is a transverse section on line 5-5 of Fig. 2.

Fig. 6 is a fragmentary section on line 66 of Fig. 2.

Fig. 7 is a fragmentary ed e view of one of the scapers, as seen on lineF-7 of Fig. 2. Fig. 8 is a perspective view of a locking screw arranged to support the scrapers in open and closed positions on the handle.

The device in its preferred form embodies a channeled handle A on which a slide B is movably mounted, and adapted to be held at selected positions by means of a screw C which extends through and is movably disposed in an elongated slot at in the web of the handle. The screw C has a squared portion C inwardly of the head thereof, which seats in the slot a of the handle so as to prevent the turning of the screw, and a wing nut D is 59 adjustably held on the threaded portion of 1928. Serial No. 231,941.

B for the purpose of locking the slide at se- I lected positions on the handle.

The handle is preferably ofchanneled cross section so that the head of the screw will be enclosed within the channel and between the flanges a a thereof. The slide B has depending flanges F), b at the sides, which overlie the flanges a, a of the handle, and said slide is also provided outwardly on its outer end with a transverse portion 7 which overlies-the web of the handle. 7

' A plurality of scraping or scoring elements E, E, etc. are pivotally mounted at their inner endsE, E by means of pins, rivets or screws, as at B, B, etc. on the transverse enlarged portion 7) of the slide. The adjacent end of the handle is provided with a cross piece F of right angular cross section and has the horizontal portion f thereof stationarily held on the end of the handle A by means of rivets or screws, as at F, while the vertical flange f of said cross piece is perforated at a plurality of points, as at e, 6, etc., horizontally alined to receive the scraping or scoring rods E, E, etc. The perforations in the member F are sufl'iciently larger than the scraping rods E to permit the spreading of the scraping elements, as shown in Fig. 1,

when the tool is operatively arranged.

The scraping elements E, E, etc. are provided with flattened scraping portions, as at v e, on their outer ends. By reference to Figs. 1

and 2 it will be noted that the scraping rods E' are of different lengths, due to the movement I of the rods while the same are being operatively and inoperatively positioned. As illustrated in Fig. 1, when the tool is in readiness for use, the scraping portions 6, etc.

of alinement and When the tool, however, is arranged for use, the slide B is moved on the handle A to the position shown in Fig. 1, or to any other selected position thereon. The perforations e on the cross piece F being spaced at greater distances apart than the pins E, the movement of the slideB and the scrapers E longitudinally of the handle will affect the spreading of the scrapers so that the ends 6 thereof are sufficiently far apart to properly score a plastered wall for the reception of a succeeding coat of plaster.

Preferably the scraping rods E are somewhat fiexible so that the operation of the tool will be more convenient and less tiresome than if the rods were rigid. 1

a What I claim is:

A plaster scoring tool comprising a supporting member provided with a longitudinal slot therein, a slide longitudinally movable along said supporting member, a bolt extending through said slot and said slide with the head of the bolt engagingthe supporting member at the sides of said slot, a

nut on said bolt for engaging said slide for adjustably securing the slide along said member, a plurality of scraping rods pivoted at one end to said slide to swing together or apart, and afixed guide on said supporting member through which said rods extend for causing said, rods to swing together or apart as said slide ismoved along said supporting member. 1 Y

. ERNEST J. BENSON. 

